Surface lighting device with closed oblique reflector

a surface lighting and reflector technology, applied in lighting and heating equipment, instruments, mechanical equipment, etc., can solve the problems of increasing costs, increasing costs, and affecting the uniformity of surface lighting devices, so as to improve the utilization of light beams and enhance uniform illumination and brightness.
US7134777B2Inactive Publication Date: 2006-11-14HON HAI PRECISION IND CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
HON HAI PRECISION IND CO LTD
Publication Date
2006-11-14
Estimated Expiration
Not applicable · inactive patent

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Abstract

A surface lighting device (1) includes a light guide plate (11), a point light source (14), and a light reflector (13) substantially juxtaposed with the light guide plate. The light guide plate has a light incident surface (111). The point light source is located between one end of the light reflector and the light incident surface. The light reflector comprises a reflecting portion (131) obliquely opposite to the light incident surface. The reflecting portion is adapted to receive light beams emitted from the point light source, and reflect the received light into the light incident surface of the light guide plate.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a surface lighting device, and particularly to a surface lighting device for a liquid crystal display (LCD) or similar apparatus.

[0003] 2. The Related Art

[0004] A typical LCD device comprises a liquid crystal display panel, and a surface lighting device mounted under the liquid crystal display panel for supplying light beams thereto. The surface lighting device mainly comprises one or more light sources for emitting light beams, and a light guide plate. The light guide plate receives the emitted light beams via a light incident surface thereof, and emits the light beams via a light output surface thereof in order to uniformly illuminate the liquid crystal display panel.

[0005] Conventionally, there are two types of light sources used in a surface light device of an LCD: a linear source such as a cold cathode fluorescent lamp (CCFL), and a point light source such as a light emitting diode (LE...

Claims

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